Your movie just doesn’t seem complete without a voiceover. Fortunately, you don’t have to hire a professional to record a voiceover in Apple iMovie. You can narrate a movie and add your voice anywhere you want in your video.
The voiceover button looks like a microphone.
You can select a Voice Enhancement box to electronically make your voice sound swell. Remember that any sound in your video will be heard as you record your own voice unless you mute it.
When you click the video frame in which you want to speak, the program prompts you with a 3-2-1 countdown.
You’ll see a purple soundtrack icon in the video where your voice will be heard. If you’re unhappy with your sound, click Undo Voiceover and try again.